Journal
APPLIED SURFACE SCIENCE
Volume 356, Issue -, Pages 391-398Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.08.029
Keywords
Ti3+ self doped; TiO2; Nanowires; Photocatalysis
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Funding
- National Basic Research Program of China (973 Program) [2013CB632401]
- Program for Taishan Scholars from Shandong province government
- National Natural Science Foundation of China [51402124]
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Synthesis of Ti3+ self-doped TiO2 with high stability is very necessary to understand the role of Ti3+ defects in photocatalytic process. In this study, we report a simple strategy for preparing stable Ti3+ self-doped TiO2 nanowires with Ti2O3 as precursors. Raman and XPS spectrum confirmed the existence of Ti3+ and oxygen vacancies. Compared with the pure TiO2, the photocatalytic activity of the Ti3+ self-doped TiO2 enhanced under UV light irradiation, however, neither pure TiO2 nor the self-dope TiO2 samples exhibit photocatalytic activity while irradiated under visible light, though the self-doped TiO2 have an enhanced absorption in visible region. On the basis of the experimental results, the possible mechanism of Ti3+ in photocatalytic process is proposed. (C) 2015 Published by Elsevier B.V.
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